Elitebook 8440P No Audio in Device manager

I am currently working on an HP Elitebook 8440p and I did a full reinstall of the OS (Windows XP Pro). All the drivers are installed and there are no issues in the device manager. The issue is that the sound driver wont install. I try to install the provided IDT audio driver and it says that the supported hardwared doesn't exist. And in windows XP under sound devices it says that none exist. So I'm not sure where to go from here, is the sound card/chip bad? Ive never had a driver not show up with the yellow question mark in device manager when something is not working.

Re: Elitebook 8440P No Audio in Device manager

Thanks for the help. I tried installing the Microsoft UAA driver before the IDT driver with no avail. This laptop has had audio issues on and off in the past which made me think that a reinstall would fix the issue. I also uninstalled and reinstalled the intel graphics driver after the UAA install to see if that would solve any issues...but it didn't appear to. I'm at a loss unless the sound chip was dying and eventually just completely went out...